Most facility expansions involve meeting current business demands. In the case of Merle West Medical Center’s $47 million project, the objective is meeting future needs. The center is spending $40 million to build an additional 50 private rooms and another $7 million to update and expand the emergency room facilities. About 50 jobs will be added as a result of the hospital’s growth. Tom Hottman, a Merle West spokesman, expects the first patients in the new space will arrive in late April or early May.